96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
/*
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*********************************************************************************************************
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* uC/GUI
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* Universal graphic software for embedded applications
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*
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* (c) Copyright 2002, Micrium Inc., Weston, FL
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* (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
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*
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* µC/GUI is protected by international copyright laws. Knowledge of the
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* source code may not be used to write a similar product. This file may
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* only be used in accordance with a license and should not be redistributed
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* in any way. We appreciate your understanding and fairness.
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*
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----------------------------------------------------------------------
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File : GUI_DrawPolyline.c
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Purpose : Implementation of GUI_DrawPolyline
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---------------------------END-OF-HEADER------------------------------
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*/
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#include <stddef.h> /* needed for definition of NULL */
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#include "GUI_Protected.h"
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/*********************************************************************
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*
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* Static code
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*
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**********************************************************************
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*/
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/*********************************************************************
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*
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* _DrawGraph
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*/
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static void _DrawGraph(I16 *pay, int NumPoints, int xOff, int yOff) {
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int i;
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int y0, y1;
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int yClip0, yClip1;
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/* Perform high level clipping in x */
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yClip0 = GUI_Context.pClipRect_HL->y0;
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yClip1 = GUI_Context.pClipRect_HL->y1;
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i=0;
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if (GUI_Context.pClipRect_HL) {
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if (xOff < GUI_Context.pClipRect_HL->x0)
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i = GUI_Context.pClipRect_HL->x0 - xOff;
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if (xOff+NumPoints-1 > GUI_Context.pClipRect_HL->x1)
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NumPoints = GUI_Context.pClipRect_HL->x1 - xOff + 1;
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}
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/* Start drawing if there is something left to do after x-clipping */
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if (i < NumPoints) {
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y0 = *(pay + i++) + yOff;
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/* Iterate */
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for (; i < NumPoints; i++) {
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/* Perform high level clipping in y */
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y1 = *(pay + i) + yOff;
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if ((y0 >= yClip0) || (y1 >= yClip0)) {
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if ((y0 <= yClip1) || (y1 <= yClip1)) {
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int y01;
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y01 = (y1 + y0) / 2;
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if (y0 <= y1) {
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LCD_DrawVLine(i + xOff - 1, y0, y01);
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LCD_DrawVLine(i + xOff, y01, y1);
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} else {
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LCD_DrawVLine(i + xOff - 1, y01, y0);
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LCD_DrawVLine(i + xOff, y1, y01);
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}
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}
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}
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y0 = y1;
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}
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}
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}
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/*********************************************************************
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*
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* Public code
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*
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**********************************************************************
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*/
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/*********************************************************************
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*
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* GUI_DrawGraph
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*/
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void GUI_DrawGraph(I16 *pay, int NumPoints, int x0, int y0) {
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GUI_LOCK();
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#if (GUI_WINSUPPORT)
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WM_ADDORG(x0,y0);
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WM_ITERATE_START(NULL); {
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#endif
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_DrawGraph(pay, NumPoints, x0, y0);
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#if (GUI_WINSUPPORT)
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} WM_ITERATE_END();
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#endif
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GUI_UNLOCK();
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}
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/*************************** End of file ****************************/
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